I'm trying to figure the current draw of a car amplifier.Currently, I multiply the total watts RMS by 2 for amplifier inefficiency, then divide by 13.8 volts. Since the average music signal requires about 1/3 of the average power in a test tone, I...
Is it enough to have 2 co-axial speekers in front & 2 3/4-way speekers in trunk to get good beets. Or additional woofer should be provided and if so, is it necessary to have an amplifier also?